AR9160 3x3 but only getting 2x2?

[Sven Hazejager]

Hi there,

I'm running FreeBSD 10-CURRENT r240893 on ALIX, just replaced my old
802.11g by a DNMA-83 3x3 802.11 card, works great, but ath only finds
2x2 instead of 3x3?

dmesg with 1 antenna (which is what I'm testing now, I already really
like MCS 7 over 11g):

ath0: <Atheros 9160> mem 0xe0080000-0xe008ffff irq 9 at device 12.0 on pci0
ath0: Setting RX chainmask to 0x1
ath0: Setting TX chainmask to 0x1
ath0: [HT] enabling HT modes
ath0: [HT] 1 RX streams; 1 TX streams
ath0: AR9160 mac 64.1 RF5133 phy 11.0
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0

Without any hints, I get this:

ath0: [HT] enabling HT modes
ath0: [HT] 2 RX streams; 2 TX streams

But I would have expected 3x3, given the specs
(http://unex.com.tw/product/dnma-83) and the 3 antenna connectors :-)

Thanks,
Sven